Hi Guys, I am trying to get a basic program going using Optaplanner 6.0.1 I have come across a problem because I am using two planning variables within a single planning entity. I have checked other examples, such as the examination example, and it seems fine to have multiple planning variables within a single planning entity. I also tried to add another planning variable to the cloud balancing example and the same error occurs so I believe there is something I need to do to be able to use multiple planning variables in a single entity. The error is as follows. Exception in thread "main" java.lang.IllegalArgumentException: The selectorConfig (ValueSelectorConfig(null)) has no configured variableName (null) for planningEntityClass (class domain.Provisional) and because there are multiple in the variableNameSet ([date, morning, technician]), it can not be deducted automatically. at org.optaplanner.core.config.heuristic.selector.SelectorConfig.deduceVariableDescriptor(SelectorConfig.java:108) I haven't found anything in the manual to suggest what needs to be done in this scenario, or found any posts of the forum regarding this topic. If anyone can point me in the right direction I would greatly appreciate it. best regards, - Lloyd Stockman -- View this message in context: http://drools.46999.n3.nabble.com/Multiple-planning-variables-in-optaplan... Sent from the Drools: User forum mailing list archive at Nabble.com. _______________________________________________ rules-users mailing list rules-users(a)lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users